US 12,136,726 B2
Asymmetric anodes for lithium-based energy storage devices
Terrence R. O'Toole, Webster, NY (US); and John C. Brewer, Rochester, NY (US)
Assigned to Graphenix Development, Inc., Williamsville, NY (US)
Filed by Graphenix Development, Inc., Williamsville, NY (US)
Filed on Sep. 29, 2022, as Appl. No. 17/955,829.
Application 17/955,829 is a continuation of application No. 17/002,311, filed on Aug. 25, 2020, granted, now 11,495,782.
Claims priority of provisional application 62/891,496, filed on Aug. 26, 2019.
Prior Publication US 2023/0015866 A1, Jan. 19, 2023
Int. Cl. H01M 4/04 (2006.01); H01M 4/131 (2010.01); H01M 4/134 (2010.01); H01M 4/136 (2010.01); H01M 4/1391 (2010.01); H01M 4/1395 (2010.01); H01M 4/1397 (2010.01); H01M 4/36 (2006.01); H01M 4/38 (2006.01); H01M 4/52 (2010.01); H01M 4/58 (2010.01); H01M 4/66 (2006.01); H01M 10/0525 (2010.01); H01M 4/02 (2006.01)
CPC H01M 4/0428 (2013.01) [H01M 4/131 (2013.01); H01M 4/134 (2013.01); H01M 4/136 (2013.01); H01M 4/1391 (2013.01); H01M 4/1395 (2013.01); H01M 4/1397 (2013.01); H01M 4/366 (2013.01); H01M 4/386 (2013.01); H01M 4/52 (2013.01); H01M 4/581 (2013.01); H01M 4/661 (2013.01); H01M 10/0525 (2013.01); H01M 2004/027 (2013.01)] 20 Claims
OG exemplary drawing
 
1. An anode for an energy storage device comprising:
a current collector comprising an electrically conductive substrate and a surface layer overlaying a first side of the electrically conductive substrate, wherein the surface layer comprises a metal oxide or a metal chalcogenide;
a lithium storage layer overlaying the surface layer, wherein the lithium storage layer: i) has a total content of amorphous silicon of at least 85 atomic %, and ii) includes less than 10 atomic % carbon; and
a plurality of lithium storage filamentary structures in contact with a second side of the electrically conductive substrate, the second side opposite the first side, wherein the plurality of lithium storage filamentary structures comprises silicon, germanium, tin, or a combination thereof.